201123113101 has 2 divisors, whose sum is σ = 201123113102. Its totient is φ = 201123113100.

The previous prime is 201123113077. The next prime is 201123113159. The reversal of 201123113101 is 101311321102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188325621225 + 12797491876 = 433965^2 + 113126^2 .

It is a cyclic number.

It is not a de Polignac number, because 201123113101 - 2⁷ = 201123112973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201123113161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100561556550 + 100561556551.

It is an arithmetic number, because the mean of its divisors is an integer number (100561556551).

Almost surely, 2^201123113101 is an apocalyptic number.

It is an amenable number.

201123113101 is a deficient number, since it is larger than the sum of its proper divisors (1).

201123113101 is an equidigital number, since it uses as much as digits as its factorization.

201123113101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 201123113101 its reverse (101311321102), we get a palindrome (302434434203).

The spelling of 201123113101 in words is "two hundred one billion, one hundred twenty-three million, one hundred thirteen thousand, one hundred one".